I have just received all of my AV equipment. I have some new and some used. My depth seems to be in mint condition, but it is used. It has the power light and there was hum when I plugged and unplugged the analysis plus sub oval connect. I have a B&K 507 that is brand new. I have the connect hooked out of the avr and into the .LFE properly . I have the subwoofer turned on in the speaker menu. I have the subwoofer turned on in the DVD player menu. I cann't get any bass out of cds or 5.1 dvds I am starting to get worried--I don't think it should work with the cd unless I have a L&R Y connect. I have it crossed over at 70 like the ML manual says high pass 12; low pass 24. I have the knobs positioned on the back like indicated in the manual. I have all speakers set to small. It is set to a level of 00. What am I missing? Please help--really worried about used gear!